CISA adds Apple OOB write flaw to KEV
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CISA added CVE-2026-86950, an actively exploited out-of-bounds write vulnerability in multiple Apple products, to its Known Exploited Vulnerabilities catalog.
CISA has added CVE-2026-86950, described as an Apple Multiple Products Out-of-Bounds Write Vulnerability, to its Known Exploited Vulnerabilities (KEV) Catalog based on evidence of active exploitation in the wild. No technical details of the exploitation chain, affected specific products/versions, or threat actor attribution were provided in this bulletin.
Under Binding Operational Directive (BOD) 26-04, Federal Civilian Executive Branch (FCEB) agencies are required to prioritize remediation of KEV-listed vulnerabilities, particularly those on publicly exposed assets that could grant an attacker total control post-exploitation, and to check for prior compromise before patching. While BOD 26-04 legally applies only to FCEB agencies, CISA recommends all organizations adopt the same risk-based prioritization for this and other KEV entries.
Defenders should identify any Apple products in their environment potentially affected by CVE-2026-86950, consult Apple's advisory for patch details and affected version ranges, and apply updates promptly given confirmed active exploitation. Organizations should also review logs for indicators of compromise predating patch deployment, consistent with BOD 26-04 guidance.
Mentioned in this report
Source reporting: https://www.cisa.gov/news-events/alerts/2026/09/29/cisa-adds-one-known-exploited-vulnerability-catalog
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